Apparatus for welding rings, &amp;c.



. No. 863,477. I PATENTED AUG. 13, 1907.

G. H. WHITE.

APPARATUS FOR WELDING RINGS, 8:0. AAAAAAAAAAAAAAAAAAAAAAAAAA e.

2 SHEETS-SHEET 1 No. 863,477. PATENTBD AUG. 13, 1907. G. H. WHITE. A

APPARATUS FOR WELDING RINGS, 8w. APPLICATION FILED JAN. so, 1906.

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. I Mmmmeya UNITED STATES GEORGE HENRY WHITE, OF oIL CITY,

MANUFACTURING COMPANY,

PATENT OFFICE.

PEnNsYLvANIA, AssIGNoR'To s. R; DRESSER OF BRADFORD, PENNSYLVANIA.

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Specification of Letters Patent.

Patented Aug. 13,- 1907.

Application filed January 30,1906. Serial No. 293,729.

declare the following to be a full, clear, and exact de '"sciiption of the invention, such as will enable others skilled in the artto which it appertains to make and use the same.

My invention consists in the novel features 'hereinafter described,-reference being had to the accompanying drawings which illustrate one form in which I have contemplated embodying my invention and the invention is fully disclosed-in the following description and claims. ,Referring to the said drawings, Figure 1 represents a perspective view of a power hammer of known construction showing my improved devices applied thereto. Fig. 2 is a front view,drawn to an enlarged scale of the hammer peg and the hammer die, and showing a ring held in operative position, for welding. Fig. 3

representsa' side elevationof the parts shown in Fig. 2,

the ring being shown in section. Fig. 4 is a detail perspective view of the hammer die, detached. Fig. 5

is a detail view of one end of the hammer peg. Fig. 6 is'a detail view showing a blank from which the ring herein shown is formed, and Fig. 7 shows the blank bent into-ring form preparatory. to welding its ends together.

The object of m invention is to provide dies of improved construction for welding, said dies being ordinarily applied to apower hammer,

and being adapted for the welding of metal rings-or other tubular devices and more especially fox-the welding of a metal ring of the kind described in my application for improvements inaprocess of making metal rings filed by'me Jan. 13, 1906 given Serial No'..29 5,889. These dies comprisean anvil, which is-adapted to be secured to the frame of a power hammer in position to support and retain the ring d g the welding operation, and a hammer die, which is adapted to be carried by the movable part of the power hammer. The anvil when applied to a power hammer is ordinarily termed the art, the hammer peg Iuthe manufacture of metal rings of the kind described, which are adapted for use as or form parts of such couplings, a fiat metal strip or ske1p.of iron or steel of a width substantially equal to the length of the desired ring, is cut into lengths to form blanks which'are then bent into ring shape by suitable means, and their ends ar welded together. In forming the ring herein shown and for which the welding dies are, especially adapted,a skelp is used which is provided-with a contral 'longitudinal bead pipe couplings,

on one face and which has its lateral edges beveled or inclined inwardly toward the beaded face. A blank cut from such a skelp is shown at A, Fig. 6, provided with the bead a and beveled edges a a. In forming thisblank into a ring the blank is bent with the bead inside, and the ends which are cut parallel and inclined the welding operation, as shown in Fig.7.

While the dies herein shown andkdescribed could be used in other ways, I prefer to employ them in connection with a power hammer substantially as herein shown and described. H represents a power hammer of awell known type, although the dies may be employed with other forms of hammer, the particular construction of which forms no part of mydinvention. P represents the anvil or hammer. peg, which has a main body of substantially cylindrical form provided on its upper face with a central transversely disposed groove p, which is of a width and depth sufficient to receive the bead a of the ring A. This groove need not extend entirely around the body of the peg and preferably is reduced in depth at either side thereof until it vanishes as clearly shown in the drawings. The front end of the peg" is provided with an outwardly extending flange p having its inner edge or shoulder beveled as at p to conform to the beveled edge of the ring (see Fig. 3) and this flange p and beveled portion p are preferably gradually reduced in height at the sides of the peg until they disappear, as shown,

The inner eid of the cylindrical body of the peg is provided with a similar projecting flange p having an inner beveled face p to conform to the edge of the ring, and the beveled face I) is preferably reduced at each side until it vanishes, while the flange proper is preferably retained for the purpose of forming on its outer or rear face an annular shoulder p where it joins a cylindrical stem p forming an integral part of the peg. In. order to support the peg in position, it is customary to provide a horizontal aperture in the frame of the hammer body, as indicated in Fig. 1 into which the stem 11) of the peg is driven, and secured in any desired manner against longitudinal and rotary movement, whilein use. The stem of the peg will be of such length and size that its engagement with the hammer frame will form a. strong support for the outer end of the edges of the ring and the ring will thus be held firmly in position while it is welded, and at the same time the metal of the welded portion will be made to conform to the faces of the blank are lapped slightly to f acilitate the beveled inner faces p and p fitting the beveled accurately to the adjacent portions of the ring thus preserving the continuity of the internal bead a, and the inclined edges a a of the ring. In connection with this hammer peg or die, I prefer to employ the form of hammer die shown at D in the drawings, though I do not limit myself to the use of any particular form of hammer with the peg herein shown and described. The hammer die D consists of a block having a dovetailed upper portion d, adapted to fit into a dovetailed recess in the reciprocating hammer head, as shown in- Fig. 1 and to be rigidly secured therein in any desired manner. The hammer die has a reduced striking faceat its lower end shown at d which is disposed longitudinally oi the hammer peg, and has its front and rear edges preferably beveled as at J (2 to correspond with the beveled portions 12 p of the peg. The bottom face of the hammer die is ordinarily made flat as shown though it may be slightly rounded.

In Welding the ends of a ring such as one of the rings A, the meeting ends of the blank are brought tothe required temperature and the ring placed upon the hammer peg as shown in Figs. 1, 2 and 3 and the hammeris then operated so as to cause a series of blows to'be struck bythe hammer die D. As before stated the lateral retaining flanges of the peg P retain the ring firmly against lateral movement under the hammer and the central groove and the inner walls of the said flanges retain the metal at the weld so that the continuity of the central bead, and of the'edges of the ring is preserved, as the metal will not be able to expand laterally beyond the flanges p, p, but will be retainedbetween them and thus the edge portions of the weld will be brought into uniformity with other portions of the edges" portions of the said head, and transwerse shoulders on uplposite sides of the said grooveffor preserving-the continuity of and preventing the spreading of the edges of the ring,- substantially-as described.

2. In an apparatus for joining the ends of rings provided with an internal annular bead, and beveled edge portions,

11 supporting anvil having its upper face curved to correspond with the curvature of the ring and adapted to'support a portion thereof, and provided with a transverse 'groove to reeeivethe meeting portions of the annular bead and transve'f'se shoulders on opposite sides of the said groove inclining away from each other from bottom upwa1'd, for preserving the continuity of the edges or the ring and preventing the spreading thereof, substantially as described.

' In testimony whereof I aflix my signature, in the pres- Witnesses-z A ELIZABETH MULLIGAN, .Tos. W. BARR. 

